CN102307024A - Graphene-based fluid power generating device for fluctuation sensing device - Google Patents
Graphene-based fluid power generating device for fluctuation sensing device Download PDFInfo
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Abstract
The invention discloses a fluid power generating device. A graphene thin film layer (2) is combined on an insulating substrate (1). The two ends of the graphene thin film layer are provided with electrodes (3 and 4) respectively. By the device, charging and discharging effects are achieved on the surface of graphene by utilizing the fluctuation of a fluid, and the output voltage of 5 to 50mV can be stably obtained. The device has a simple structure, and saves a rotating or driving part. Theoretically, the output voltage and current of the power generating device can be effectively improved by the series connection and parallel connection of a plurality of power generating units, and the device can serve as an effective output power supply for a miniature load. In addition, the fluid power generating device can serve as a passive sensing device for the fluctuation intensity of the fluid due to own voltage-fluctuation speed characteristics. The invention discloses a manufacturing method for the fluid power generating device.
Description
Technical field
The present invention relates to TRT, particularly utilize the discharge and recharge effect of fluid, fluid wave kinetic energy is converted into electric energy, constitute the interchange flow generator on the Graphene surface.
Background technology
Along with the level of integrated system of following transducer, converter, data processing, control unit and communication system is increasingly high; Constantly reducing of device feature size; The energy consumption of function element constantly reduces, and the power consumption of business-like device such as bluetooth communication has been low to moderate 10 nW/bit.That wireless passive equipment can be realized is passive, the on-line monitoring of low-power consumption, unmanned nurse, and data in real time is passed back, improves the operational efficiency of equipment, reduces the maintenance cost of system.Wireless passive equipment generally is a direct collecting energy from the environment at transducer or controller place, like luminous energy, heat energy, electromagnetic wave, shock energy and other forms of mechanical energy etc.
Nanometer technology is especially being brought into play more and more important effect in the wireless and passive device receiving the intellectual material devices field.The Wang Zhonglin professor seminar of the georgia ,u.s.a Institute of Technology utilizes the piezoelectric property of ZnO nano wire; In the nanoscale scope, mechanical energy is converted into electric energy; Processed the nano generator that mechanical vibrational energy, fluid vibration ability etc. is changed into electric energy; Can be through integrated its output voltage of device to 10 V, output current 0.6 μ A (Http: //dx.doi.org/10.1021/nl201505c).Discover that air-flow can produce when on carbon nano-tube bundle, flowing～voltage of mV level, and the voltage of air velocity and generation has linear relationship, can be used as Conversion of energy system or fluid sensor (Science, 2003,299,1042-1044).
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, the flow generator that expense is low.
In order to address the above problem, technical scheme of the present invention is following:
A kind of flow generator, its structure is as shown in Figure 1, and it is to go up in dielectric base (1) to combine one deck graphene film layer (2), and electrode (3) and electrode (4) are arranged respectively at the two ends of graphene film layer.
Above-mentioned flow generator, described dielectric base can be solid insulating materials arbitrarily, like plastics, rubber, glass etc.
Above-mentioned flow generator, described electrode includes but not limited to metal electrode or other any electric conducting materials such as copper, iron, gold, silver, like ITO, PEDOT-PSS etc.
A kind of method for preparing above-mentioned flow generator, it comprises the steps:
(1) prepare dielectric base, clean, nitrogen dries up;
(2) chemical vapor deposition growth Graphene: with the Copper Foil is substrate, keeps 950 ~ 1000 ℃ of growth temperatures, feeds methane and hydrogen; Gas flow is methane 25 sccm; Hydrogen 10 sccm grew after 15 minutes, closed methane; Under 10sccm hydrogen gas stream protection, be cooled fast to room temperature, on Copper Foil, obtain the number of plies and be the graphene film of 1 layer or multilayer;
(3) Graphene is transferred in the substrate: the copper sheet surface that will be coated with Graphene is coated with the methyl phenyl ethers anisole solution of 5% polymethyl methacrylate (PMMA); Placing the 0.1Mol/L ferric chloride solution to be dipped to copper copper sheet after the methyl phenyl ethers anisole volatilization dissolves fully; Obtain floating on the Graphene-PMMA layer on the solution, after watery hydrochloric acid and washed with de-ionized water, it is transferred in the substrate; After firmly, remove the PMMA layer, obtain transferring to suprabasil graphene film layer with acetone solution;
(4) electrode preparation: after graphene film layer two ends make electrode (3) and (4), draw lead,, promptly make flow generator with the encapsulation of insulation silica gel.
The preparation method of above-mentioned flow generator, the described graphene film of step (two) can be the single or multiple lift graphene film of method preparations such as epitaxial growth or chemistry assembling.
Above-mentioned flow generator, the fluid that uses during generating comprise that seawater, lake water, ionic liquid, salting liquid etc. have the ionizable liquid that goes out ion arbitrarily.
Above-mentioned flow generator, the motion state during generating can be the fluctuations up and down of fluid level, or flow generator moves up and down at liquid surface, and the part Graphene exposes liquid level.
Above-mentioned flow generator can obtain higher output voltage or electric current by serial or parallel connection.
Above-mentioned flow generator can be as the transducer of the moving state of monitoring stream bulk wave.
The present invention utilizes the discharge and recharge effect of fluid fluctuation on the Graphene surface, can stablize the output voltage that obtains 5～50mV.Apparatus of the present invention are simple in structure, do not have and rotate or drive disk assembly, on the principle, through the series connection and the parallelly connected output voltage and the electric current that can effectively improve TRT of a plurality of generator units, can be used as effective out-put supply of small-sized load.In addition, the voltage of this flow generator-velocity of wave motion characteristic can be as the transducer of fluid wave fatigue resistance.
Description of drawings
Fig. 1 is the structural representation of flow generator;
Fig. 2 is the flow generator of embodiment 1;
Fig. 3 is the output voltage-time relationship of embodiment 1 generator unit when in sodium chloride solution, moving;
Fig. 4 is immersion speed-voltage relationship among the embodiment 2;
Fig. 5 is change in voltage and a time relationship during follow-on test among the embodiment 2;
Fig. 6 is the flow generator of embodiment 3;
Fig. 7 is TRT output voltage-time relationship among the embodiment 3;
Fig. 8 is the voltage-time relationship when generator unit moves in metabisulfite solution among the embodiment 4.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is explained further details.
Embodiment 1:
TRT is as shown in Figure 2, and the concrete operations step is following:
(1) prepare dielectric base PETG (PET): with acetone, ethanol, each 10min of deionized water ultrasonic cleaning PET film, nitrogen dries up.
(2) chemical vapor deposition growth Graphene: with 25 micron thick Copper Foils is substrate, keeps 950～1000 ℃ of growth temperatures, feeds methane and hydrogen; Gas flow is methane 25 sccm; Hydrogen 10 sccm grew after 15 minutes, closed methane; Under the protection of 10sccm hydrogen gas stream, be cooled fast to room temperature, on Copper Foil, obtain the graphene film that the number of plies is the 1-2 layer.
(3) Graphene is transferred to the PET film: the copper sheet surface that will be coated with Graphene is coated with 5% PMMA methyl phenyl ethers anisole solution; Placing the 0.1Mol/L ferric chloride solution to be dipped to copper copper sheet after the methyl phenyl ethers anisole volatilization dissolves fully; Obtain floating on the Graphene-PMMA layer on the solution, after watery hydrochloric acid and washed with de-ionized water, it is transferred in the PET substrate; After firmly, remove the PMMA layer, obtain transferring to the suprabasil graphene film layer of PET with acetone solution.
(4) electrode preparation: behind Graphene sample two ends deposition Au electrodes (3) and (4), wire bonds to gold electrode, is encapsulated with insulation silica gel.
(5) will between electrode (3) and electrode (4), be connected to voltmeter or load.
(6) flow generator is immersed in the sodium chloride solution process of 0.1 Mol/L, speed is 78 cm/s, observes at voltmeter to produce～voltage of 15 mV, and the electric current of generation is at several mA, and is as shown in Figure 3.From the sodium chloride solution of 0.1 Mol/L, propose fluid generating unit, produced～reverse voltage of 3 mV.
Embodiment 2:
Flow TRT as the fluctuation transducer, and the concrete operations step is following:
Flow generator with embodiment 1 preparation; Change the speed that flow generator immerses 0.1 Mol/L sodium chloride solution; Can obtain immersion speed and voltage and have certain linear relationship; Instance measured speed scope is 0.1～0.8 m/s, and precision can reach Centimeter Level when immersion speed is lower than 50cm/s, and the result sees that table 1 is with shown in Figure 4.Produce voltage and time relation during follow-on test fluid velocity of wave motion 0.8m/s, the output voltage signal fluctuation is very little, and the result is as shown in Figure 5.This shows that this flow generator can be used for the fluid wave dynamic sensor.
Table 1
| [0001] Speed (cm/s) | [0002] Voltage (mV) |
| [0003] 7.8 | [0004] 4.34 |
| [0005] 10.5 | [0006] 5.03 |
| [0007] 14.3 | [0008] 6.10 |
| [0009] 17.2 | [00010] 7.15 |
| [00011] 20.2 | [00012] 8.07 |
| [00013] 23.6 | [00014] 9.60 |
| [00015] 28.0 | [00016] 10.24 |
| [00017] 30.7 | [00018] 10.82 |
| [00019] 34.3 | [00020] 12.08 |
| [00021] 78.0 | [00022] 21.05 |
Embodiment 3:
TRT is as shown in Figure 6, and the concrete operations step is following:
With being connected to voltmeter after 2 flow generator series connection by embodiment 1 preparation; Two TRTs move in the 0.1Mol/L sodium chloride solution simultaneously; Speed is 80 cm/s, and the voltage that voltmeter observes generation is about the twice (～30 mV) of single fluid generating unit.The result is as shown in Figure 7.This shows that this flow generator can improve output voltage through series connection.
Embodiment 4:
Flow generator, the concrete operations step is following:
Use the experimental provision identical with embodiment 1, ionogenic electrolyte is used the metabisulfite solution of 0.1 Mol/L instead among the embodiment 2, and experimental result is as shown in Figure 8.This shows this TRT equal effective output voltage in different ionizable electrolyte.
Claims (9)
1. flow generator is characterized in that: it is to go up in dielectric base (1) to combine one deck graphene film layer (2), and electrode (3) and electrode (4) are arranged respectively at the two ends of graphene film layer.
2. according to the said flow generator of claim 1, it is characterized in that: described dielectric base is a solid insulating material arbitrarily, comprises plastics, rubber, glass or quartz.
3. according to the said flow generator of claim 1, it is characterized in that: described electrode includes but not limited to metal electrode or other any conductive solids materials such as copper, iron, gold, silver.
4. method for preparing the said flow generator of claim 1, it comprises the steps:
(1) prepare dielectric base, clean, nitrogen dries up;
(2) chemical vapor deposition growth Graphene: with the Copper Foil is substrate, keeps 950～1000 ℃ of growth temperatures, feeds methane and hydrogen; Gas flow is methane 25 sccm; Hydrogen 10 sccm grew after 15 minutes, closed methane; Under 10sccm hydrogen gas stream protection, be cooled fast to room temperature, on Copper Foil, obtain the number of plies and be the graphene film of 1 layer or multilayer;
(3) Graphene is transferred in the substrate: the copper sheet surface that will be coated with Graphene is coated with the methyl phenyl ethers anisole solution of 5% polymethyl methacrylate (PMMA); Placing the 0.1Mol/L ferric chloride solution to be dipped to copper copper sheet after the methyl phenyl ethers anisole volatilization dissolves fully; Obtain floating on the Graphene-PMMA layer on the solution, after watery hydrochloric acid and washed with de-ionized water, it is transferred in the substrate; After firmly, remove the PMMA layer, obtain transferring to suprabasil graphene film layer with acetone solution;
(4) electrode preparation: after graphene film layer two ends make electrode (3) and (4), draw lead,, promptly make flow generator with the encapsulation of insulation silica gel.
5. according to the preparation method of the said flow generator of claim 4, it is characterized in that: the described graphene film of step (two) is the single or multiple lift graphene film of epitaxial growth or the preparation of chemical assemble method.
6. according to the said flow generator of claim 1, it is characterized in that: the fluid that uses during generating comprises that seawater, lake water, ionic liquid, salting liquid etc. have the liquid of ionizable character arbitrarily.
7. according to the said flow generator of claim 1, it is characterized in that: the motion state during generating is the fluctuation up and down of fluid level, or flow generator moves up and down at liquid surface, and the part Graphene exposes liquid level.
8. according to the said flow generator of claim 1, it is characterized in that: described flow generator serial or parallel connection can obtain higher output voltage or electric current.
9. according to the said flow generator of claim 1, it is characterized in that: it can be used as the transducer of the moving state of monitoring stream bulk wave.
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